sand versus shot in speaker stands

Lead shot is just fine (the real tiny stuff from the gun store)- much better/heavier than sand in my experience. I have filled a Target stand with it, along with a pair of speaker stands- I did not have any 'dust' when I was filling mine- wore gloves while doing so; then sealed the holes with black electrical and/or duct tape- don't see how this would be a problem, as it is all inside the stand(s)...

all of lead's toxic charms are still being discovered. i do not think any manufacturers are recommending it anymore.

Would there be an issue in using lead if once installed it were potted in place using expanding foam or other 'goo'?
How about using some kind of epoxy resin to fill the stand/voids after filling w/shot? No way will it ever come out or get to atmosphere.

Wear gloves / long sleeves / and a particle/dust mask when handling it?

Blasting sand is dry in the bag and ready to use. No stirring or baking is required.

Elizabeth is correct. Sand is neither hydrophilic nor deliquescent. Sand does NOT absorb moisture from the atmosphere. Sand attracting moisture is another myth perpetuated by repetition by those who flunked chemistry.